Waterproof thumb mouse

The utility model belongs to the field of mice, particularly relates to a waterproof thumb mouse, and aims to solve the problem that a common mouse is difficult to deal with special environments such as humid, mould and greasy industrial environments, chemical corrosion and the like in the fields of industry, medical treatment, coal mines and the like from the aspects of using functions and performance in the prior art. A mounting seat is arranged in the shell, a trackball is arranged in the mounting seat, an upper cover is arranged at the top of the shell, the upper cover is matched with the trackball for use, one part of the trackball extends to the outer part of the upper cover, and a PCB (Printed Circuit Board) is arranged on the other side of the shell. Mouse pointer movement is achieved through the MINI laser sensor, noise-free, rapid and accurate data input can be achieved, good and comfortable operation touch feeling is achieved, the whole mouse is fixed to a table top through screws so as to prevent